DE60103474T2 - Liquefaction handpiece - Google Patents
Liquefaction handpiece Download PDFInfo
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- DE60103474T2 DE60103474T2 DE60103474T DE60103474T DE60103474T2 DE 60103474 T2 DE60103474 T2 DE 60103474T2 DE 60103474 T DE60103474 T DE 60103474T DE 60103474 T DE60103474 T DE 60103474T DE 60103474 T2 DE60103474 T2 DE 60103474T2
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- Germany
- Prior art keywords
- handpiece
- fluid
- pumping chamber
- surgical
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3203—Fluid jet cutting instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320084—Irrigation sleeves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B2018/044—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B2018/044—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid
- A61B2018/046—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid in liquid form
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00763—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments with rotating or reciprocating cutting elements, e.g. concentric cutting needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/77—Suction-irrigation systems
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Electrotherapy Devices (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Description
Hintergrund der Erfindungbackground the invention
Diese Erfindung betrifft allgemein das Gebiet der Operation des Grauen Stars und insbesondere ein Handstück zur Durchführung der Liquefrakturtechnik zur Entfernung des Grauen Stars.These The invention relates generally to the field of gray operation Stars and in particular a handpiece to carry out the Liquefracture technique for the removal of cataracts.
Das menschliche Auge funktioniert in der einfachsten Betrachtungsweise so, daß das Sehvermögen darauf beruht, daß Licht durch einen klaren äußeren Bereich, der Hornhaut genannt wird, übertragen wird und das Bild mit Hilfe der Linse auf die Netzhaut fokussiert wird. Die Qualität des fokussierten Bildes hängt von vielen Faktoren einschließlich der Größe und der Form des Auges und der Transparenz der Hornhaut und der Linse ab.The human eye works in the simplest way so that that eyesight It is based on the fact that light through a clear outer area, the cornea is called, transmitted and the image is focused on the retina using the lens becomes. The quality of the focused image hangs of many factors including the Size and the Shape of the eye and the transparency of the cornea and the lens.
Wenn das Alter oder eine Krankheit dafür verantwortlich sind, daß die Linse weniger transparent wird, verschlechtert sich das Sehvermögen aufgrund der verringerten Lichtmenge, die zur Netzhaut übertragen werden kann. Diese Unzulänglichkeit der Linse des Auges ist medizinisch als Grauer Star bekannt. Eine anerkannte Behandlung dieses Zustands ist die chirurgische Entfernung der Linse und das Ersetzen der Linsenfunktion durch eine künstliche intraokulare Linse (IOL).If the age or disease are responsible for that lens becomes less transparent, eyesight deteriorates due to the reduced amount of light that can be transmitted to the retina. These insufficiency The lens of the eye is known medically as a cataract. A recognized treatment of this condition is surgical removal the lens and replacing the lens function with an artificial one intraocular lens (IOL).
In den USA wird die Mehrzahl der vom Grauen Star betroffenen Linsen mit einer chirurgischen Technik entfernt, die Phakoemulsifikation genannt wird. Bei dieser Prozedur wird eine dünne Phakoemulsifikationsschneidespitze in die erkrankte Linse eingeführt und mit Ultraschall zu Schwingungen angeregt. Die vibrierende Schneidespitze verflüssigt oder emulsifiziert die Linse, so daß sie aus dem Auge herausgesaugt werden kann. Die erkrankte Linse wird nach ihrer Entfernung durch eine künstliche Linse ersetzt.In the United States is the majority of the cataract lenses removed with a surgical technique, phacoemulsification is called. This procedure becomes a thin phacoemulsification cutting tip introduced into the diseased lens and excited to vibrate with ultrasound. The vibrating cutting tip liquefied or emulsifies the lens so that it can be sucked out of the eye. The diseased lens becomes replaced after its removal by an artificial lens.
Eine typische chirurgische Ultraschallvorrichtung, die für Augenbehandlungen geeignet ist, besteht aus einem mit Ultraschall betriebenen Handstück, einer daran befestigten Schneidespitze, einer Bewässerungshülse und einer elektronischen Steuerungskonsole. Die Handstückanordnung ist mit einem elektrischen Kabel und flexiblen Schläuchen an der Steuerungskonsole angeschlossen. Mit der Konsole wird über das elektrische Kabel der durch das Handstück zur daran befestigten Schneidspitze übertragene Strompegel variiert. Ferner wird über die flexiblen Schläuche ein Bewässerungsfluid zum Auge zugeführt und angesaugtes Fluid vom Auge durch die Handstückanordnung abgesaugt.A typical ultrasonic surgical device used for eye treatments is suitable, consists of an ultrasonic handpiece, a attached cutting tip, an irrigation sleeve and an electronic Control console. The handpiece arrangement is with an electric cable and flexible hoses at the Control console connected. With the console is over the electrical cables transmitted through the handpiece to the cutting tip attached thereto Power level varies. Further, via the flexible hoses irrigation fluid fed to the eye and sucked fluid sucked from the eye through the handpiece assembly.
Der maßgebliche Teil des Handstücks ist ein zentral angeordneter hohler schwingender Stab oder Horn, der direkt an einer Gruppe piezoelektrischer Kristalle befestigt ist. Die von der Konsole gesteuerten Kristalle liefern die erforderliche Ultraschallschwingung, die benötigt wird, um sowohl das Horn als auch die daran befestigte Schneidespitze während der Phakoemulsifikation anzutreiben. Die Kristall-/Horn-Anordnung ist im hohlen Körper bzw. der Schale des Handstücks mit flexiblen Halterungen aufgehängt. Der Körper des Handstücks endet in einem Abschnitt mit einem reduzierten Durchmesser oder Nasenkonus am distalen Ende des Körpers. Der Nasenkonus ist außen mit einem Gewinde versehen, um die Bewässerungshülse aufzunehmen. In ähnlicher Weise ist die Bohrung im Horn an ihrem distalen Ende innen mit einem Gewinde versehen, um das äußere Gewinde der Schneidspitze aufzunehmen. Die Bewässerungshülse umfaßt ebenfalls eine mit einem Innengewinde versehene Bohrung, die auf das Außengewinde des Nasenkonus geschraubt wird. Die Schneidspitze ist so angepasst, daß die Spitze lediglich um einen vorbestimmten Betrag aus dem offenen Ende der Bewässerungshülse vorragt. Ultraschallhandstücke und Schneidespitzen sind in weiteren Einzelheiten in den US-Patenten 3,589,363; 4,223,676; 4,246,902; 4,493,694; 4,515,583; 4,589,415; 4,609,368; 4,869,715; 4,922,902; 4,989,583; 5,154,694 und 5,359,996 beschrieben.Of the authoritative Part of the handpiece is a centrally located hollow swinging rod or horn, attached directly to a group of piezoelectric crystals is. The crystals controlled by the console provide the required Ultrasonic vibration that needed will be to both the horn and the attached cutting tip while to drive the phacoemulsification. The crystal / horn arrangement is in the hollow body or the shell of the handpiece suspended with flexible brackets. The body of the handpiece ends in a section with a reduced diameter or Nasal cone at the distal end of the body. The nose cone is outside with threaded to receive the watering sleeve. In similar Way, the bore in the horn is at one with its distal end Threaded to the outer thread to absorb the cutting tip. The irrigation sleeve also includes one with a Internally threaded bore, which screwed onto the external thread of the nose cone becomes. The cutting tip is adjusted so that the tip only by one predetermined amount protrudes from the open end of the irrigation sleeve. Ultrasonic handpieces and cutting tips are described in further detail in the US patents 3,589,363; 4,223,676; 4,246,902; 4,493,694; 4,515,583; 4,589,415; 4,609,368; 4,869,715; 4,922,902; 4,989,583; 5,154,694 and 5,359,996 described.
Beim Gebrauch werden die Enden der Schneidspitze und der Bewässerungshülse in einen schmalen Einschnitt mit einer vorbestimmten Breite in der Netzhaut, der Lederhaut oder an einem anderen Ort eingeführt. Die Schneidspitze wird mit Ultraschall längs ihrer longitudinalen Achse in der Bewässerungshülse durch das kristallangetriebene Ultraschallhorn zu Schwingungen angeregt, wodurch das ausgewählte Gewebe lokal emulsifiziert wird. Die hohle Bohrung der Schneidspitze befindet sich in einer Kommunikationsverbindung mit der Bohrung im Horn, das sich wiederum in einer Kommunikationsverbindung mit der Ansaugleitung vom Handstück zur Konsole befindet. Eine Unterdruck- oder Vakuumquelle in der Konsole zieht oder saugt das emulsifizierte Gewebe vom Auge durch das offene Ende der Schneidspitze, die Schneidspitzen- und Hornbohrung und die Ansaugleitung und in eine Sammelvorrichtung ab. Das Absaugen des emulsifizierten Gewebes wird durch eine Salzspüllösung bzw. Bewässerungsmittel unterstützt, das am Ort des Eingriffs durch den kleinen kreisförmigen Spalt zwischen der inneren Oberfläche der Bewässerungshülse und der Schneidspitze injiziert wird.At the Use the ends of the cutting tip and the irrigation sleeve in a narrow Incision with a predetermined width in the retina, the dermis or introduced elsewhere. The cutting tip is ultrasonically along its longitudinal axis in the watering sleeve the crystal-driven ultrasonic horn is excited to vibrate, causing the selected Tissue is emulsified locally. The hollow hole of the cutting tip is in communication with the hole in the horn, which in turn is in communication with the suction line from the handpiece to Console is located. A vacuum or vacuum source in the console the emulsified tissue pulls or sucks from the eye through the open End of the cutting tip, the cutting tip and horn bore and the suction line and into a collecting device. The suction the emulsified tissue is replaced by a salt rinse or irrigation materials support at the place of engagement by the small circular gap between the inner surface the irrigation sleeve and the cutting tip is injected.
Kürzlich wurde eine neue Technik zur Entfernung des Grauen Stars entwickelt, welche die Injektion von heißem Wasser bzw. einer heißen Salzlösung umfaßt (ungefähr 45°C bis 105°C), um den harten Linsenkern zu verflüssigen oder zu gelieren, wodurch es möglich wird, die verflüssigte Linse aus dem Auge zu saugen. Das Absaugen wird zeitgleich mit der Injektion der erhitzten Lösung und der Injektion einer relativ kühlen Lösung durchgeführt, wodurch die erhitzte Lösung rasch abgekühlt und entfernt wird. Diese Technik ist in weiteren Einzelheiten im US-Patent 5,616,120 beschrieben (Andrew, et al.). Bei der in der Veröffentlichung offenbarten Vorrichtung wird jedoch die Lösung getrennt vom chirurgischen Handstück erhitzt. Die Temperatursteuerung der erhitzten Lösung kann schwierig sein, da die Fluidschläuche, die das Handstück versorgen, typischerweise bis zu zwei Meter lang sind und sich die erhitzte Lösung beträchtlich Abkühlen kann, wenn sie über die Länge des Schlauches fließt.Recently, a new cataract removal technique has been developed which involves the injection of hot water or a hot saline solution (approximately 45 ° C to 105 ° C) to liquefy or gel the hard lens nucleus, thereby making it possible to to suck the liquefied lens out of the eye. The suction is simultaneous with the injection of the heated solution and the injection a relatively cool solution, whereby the heated solution is rapidly cooled and removed. This technique is described in more detail in U.S. Patent 5,616,120 (Andrew, et al.). However, in the device disclosed in the publication, the solution is heated separately from the surgical handpiece. Controlling the temperature of the heated solution can be difficult because the fluid hoses that provide the handpiece are typically up to two meters long and the heated solution can cool considerably as it travels the length of the hose.
Das US-Patent 5,885,243 (Capetan, et al.) offenbart ein Handstück mit einem getrennten Pumpmechanismus und einem Widerstandsheizelement. Eine derartige Struktur verkompliziert das Handstück in einer nicht notwendigen Weise. Ein Liquefrakturhandstück der hier beschriebenen Bauart ist auch in unseren europäischen Patentanmeldungen EP-A-0,962,203, EP-A-962,204 und EP-A-0,962,205 offenbart.The U.S. Patent 5,885,243 (Capetan, et al.) Discloses a handpiece having a handle separate pumping mechanism and a resistance heating element. A Such a structure complicates the handpiece in an unnecessary manner Wise. A liquefracture hand piece of the type described here is also disclosed in our European Patent Applications EP-A-0,962,203, EP-A-962,204 and EP-A-0,962,205.
Abriß der ErfindungOutline of the invention
Die vorliegende Erfindung stellt gegenüber dem Stand der Technik eine Verbesserung dar, indem ein chirurgisches Handstück gemäß den folgenden Ansprüchen mit zwei koaxial montierten Rohren oder Kanälen bereitgestellt wird, die an einem Körper montiert sind. Das erste Rohr wird zum Ansaugen verwendet und hat einen geringeren Durchmesser als das zweite Rohr, wobei zwischen dem ersten und zweiten Rohr ein ringförmiger Durchgang hergestellt wird. Der Ringspalt steht in einer Kommunikationsverbindung mit einer zwischen zwei Elektroden gebildeten Pumpkammer. Die Funktionsweise der Pumpkammer besteht darin, ein kleines Volumen des chirurgischen Fluids zum Sieden zu bringen. Wenn das Fluid siedet, dehnt es sich rasch aus, wodurch die Flüssigkeit stromabwärts zur Pumpkammer aus dem Ringspalt getrieben wird. Das distale Ende des Ringspalts ist durch reibschlüssiges Zusammenfügen der distalen Enden des ersten und des zweiten Rohres abgedichtet. Eine oder mehrere in entweder dem ersten oder zweiten Rohr gebildete Nuten ermöglichen ein Vorwärtstreiben von Fluid durch den Ringspalt, so daß dieses austritt. Beispielsweise kann durch Umfalten des zweiten Rohres in der Nähe des distalen Endes des zweiten Rohres eine Barriere vorgesehen werden, auf die das austretende Fluid auftritt.The present invention over the prior art one Improvement by using a surgical handpiece according to the following claims two coaxially mounted pipes or channels is provided, the mounted on a body are. The first pipe is used for suction and has a smaller one Diameter than the second tube, being between the first and second Tube a ring-shaped Passage is made. The annular gap is in a communication connection with a pumping chamber formed between two electrodes. The functioning The pumping chamber is a small volume of surgical Boil fluids. When the fluid boils, it expands rapidly, causing the fluid downstream is driven to the pumping chamber from the annular gap. The distal end of the annular gap is by frictionally joining the distal Ends of the first and second tube sealed. One or more allow in either the first or second tube formed grooves a drive forward of fluid through the annular gap, so that this exits. For example, can by folding over the second tube near the distal end of the second Pipe a barrier be provided on which the exiting Fluid occurs.
Demgemäß ist es eine Aufgabe der vorliegenden Erfindung ein chirurgisches Handstück mit zumindest zwei koaxialen Rohren bereitzustellen.Accordingly, it is An object of the present invention, a surgical handpiece with at least to provide two coaxial tubes.
Eine weitere Aufgabe der vorliegenden Erfindung ist es, ein Handstück mit einer Pumpkammer bereitzustellen.A Another object of the present invention is to provide a handpiece with a To provide pumping chamber.
Eine weitere Aufgabe der vorliegenden Erfindung ist es, ein chirurgisches Handstück mit einer Vorrichtung zur Abgabe des chirurgischen Fluids durch das Handstück in Pulsen bereitzustellen.A Another object of the present invention is to provide a surgical handpiece with a device for delivering the surgical fluid through the handpiece to provide in pulses.
Noch eine weitere Aufgabe der vorliegenden Erfindung ist es, ein Handstück mit einer Pumpkammer bereitzustellen, die durch zwei Elektroden gebildet wird.Yet Another object of the present invention is to provide a handpiece with a To provide pumping chamber, which is formed by two electrodes.
Noch eine weitere Aufgabe der vorliegenden Erfindung besteht darin, ein Handstück mit zwei Elektroden bereitzustellen, wobei die Elektroden isoliert sind.Yet Another object of the present invention is a handpiece with two electrodes, the electrodes being insulated.
Noch eine weitere Aufgabe der vorliegenden Erfindung besteht darin, ein Handstück bereitzustellen, das Fluidpulse in einer gesteuerten und gerichteten Weise liefert.Yet Another object of the present invention is a handpiece to provide the fluid pulses in a controlled and directed manner Way supplies.
Diese und weitere Merkmale und Vorteile der vorliegenden Erfindung werden aus der detaillierten Beschreibung und den nachfolgenden Ansprüchen verständlich.These and other features and advantages of the present invention from the detailed description and the following claims.
Kurzbeschreibung der ZeichnungenSummary the drawings
Detaillierte Beschreibung der Erfindungdetailed Description of the invention
Das
Handstück
Die
Hülse
Wie
am besten in
Wie
am besten in
Wie
am besten in den
Beim
Gebrauch tritt chirurgisches Fluid in das Reservoir
Für den Fachmann
ist erkennbar, daß die Nummerierung
in den
Wie
am besten in den
Beim
Gebrauch tritt chirurgisches Fluid in das Reservoir
Für den Fachmann
ist erkennbar, daß die Nummerierung
in den
Während verschiedene Ausführungsformen des Handstücks der vorliegenden Erfindung offenbart werden, kann jedoch jedes Handstück, mit dem eine geeignete Druckimpulskraft, Temperatur, Anstiegszeit und Frequenz erzeugt werden kann, ebenfalls verwendet werden. Beispielsweise kann jedes Handstück, mit dem eine Druckimpulskraft zwischen 0,02 g und 20,0 g mit einer Anstiegszeit zwischen 1 g/s und 20,000 g/s und einer Frequenz zwischen 1 Hz und 200 Hz erzeugt werden kann, verwendet werden, wobei eine Frequenz zwischen 10 Hz und 100 Hz am meisten bevorzugt wird. Die Druckimpulskraft und Frequenz variiert mit der Härte des Materials, das entfernt wird. Beispielsweise konnten die Erfinder feststellen, daß eine niedrige Frequenz zusammen mit einer höheren Impulskraft am wirksamsten beim Verdichten und Entfernen des relativ harten Kernmaterials ist, während eine höhere Frequenz und eine niedrigere Impulskraft beim Entfernen des weicheren epinuklearen und kortikalen Materials wirkungsvoll sind. Der Infusionsdruck, die Absaugflußrate und die Grenze des Unterdrucks sind ähnlich wie bei gängigen Phakoemulsifikationstechniken.While different Embodiments of handpiece can be disclosed in the present invention, however, each hand piece, with a suitable pressure impulse force, temperature, rise time and Frequency can be generated, also used. For example can any handpiece, with a pressure impulse force between 0.02 g and 20.0 g with a Rise time between 1 g / s and 20,000 g / s and a frequency between 1 Hz and 200 Hz can be used, with a Frequency between 10 Hz and 100 Hz is most preferred. The Pressure impulse force and frequency varies with the hardness of the material being removed becomes. For example, the inventors have found that a low Frequency together with a higher one Impulse force most effective in compressing and removing the relative hard core material is while a higher one Frequency and a lower momentum when removing the softer epinuclear and cortical material are effective. Infusion pressure, the suction flow rate and the limit of negative pressure are similar to common phacoemulsification techniques.
Wie
in
Wie
in
Wie
in
Beim
Gebrauch erhält
das Steuerungsmodul
Es kann jedes Verfahren verwendet werden, um die Wärmemenge, die in das Auge eingeführt wird, zu begrenzen. Beispielsweise kann der Arbeitszyklus der Impulsfolge der erhitzten Lösung in Abhängigkeit von der Impulsfrequenz so variiert werden, daß die Gesamtmenge der erhitzten Lösung, die in das Auge eingeführt wird, mit der Pulsfrequenz nicht variiert. Alternativ kann die Absaugflußrate in Abhängigkeit von der Pulsfrequenz so variiert werden, daß die Absaugflußrate proportional mit einem Anstieg der Pulsfrequenz erhöht wird.It Any method can be used to measure the amount of heat that is introduced into the eye to limit. For example, the duty cycle of the pulse train the heated solution dependent on be varied from the pulse frequency so that the total amount of heated Solution, which introduced into the eye is not varied with the pulse rate. Alternatively, the Absaugflußrate depending on be varied by the pulse rate so that the Absaugflußrate proportional is increased with an increase in the pulse rate.
Die Beschreibung ist zum Zwecke der Veranschaulichung und Erläuterung angegeben. Für Fachleute ist erkennbar, daß Änderungen und Abwandlungen an der oben beschriebenen Erfindung vorgenommen werden können, ohne von ihrem Umfang abzuweichen. Beispielsweise ist für den Fachmann erkennbar, daß die vorliegende Erfindung mit Ultraschall- und/oder rotierenden Schneidespitzen kombiniert werden kann, um ihre Leistungsfähigkeit zu erhöhen.The Description is for the purpose of illustration and explanation specified. For Professionals recognize that changes and modifications are made to the invention described above can be without departing from its scope. For example, it will be apparent to those skilled in the art, that the present invention with ultrasonic and / or rotating cutting tips can be combined to increase their performance.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US690259 | 2000-10-17 | ||
US09/690,259 US6398759B1 (en) | 1998-06-04 | 2000-10-17 | Liquefracture handpiece tip |
Publications (2)
Publication Number | Publication Date |
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DE60103474D1 DE60103474D1 (en) | 2004-07-01 |
DE60103474T2 true DE60103474T2 (en) | 2005-06-16 |
Family
ID=24771756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE60103474T Expired - Lifetime DE60103474T2 (en) | 2000-10-17 | 2001-09-28 | Liquefaction handpiece |
Country Status (14)
Country | Link |
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US (1) | US6398759B1 (en) |
EP (2) | EP1199054B1 (en) |
JP (1) | JP4091282B2 (en) |
AR (1) | AR030590A1 (en) |
AT (1) | ATE267570T1 (en) |
AU (1) | AU774275B2 (en) |
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- 2001-09-28 EP EP01203702A patent/EP1199054B1/en not_active Expired - Lifetime
- 2001-09-28 EP EP03003909A patent/EP1314409A3/en not_active Ceased
- 2001-09-28 ES ES01203702T patent/ES2217088T3/en not_active Expired - Lifetime
- 2001-09-28 DK DK01203702T patent/DK1199054T3/en active
- 2001-09-28 JP JP2001300325A patent/JP4091282B2/en not_active Expired - Fee Related
- 2001-10-04 CA CA002358266A patent/CA2358266A1/en not_active Abandoned
- 2001-10-17 BR BRPI0104581-4A patent/BR0104581B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP4091282B2 (en) | 2008-05-28 |
DE60103474D1 (en) | 2004-07-01 |
AR030590A1 (en) | 2003-08-27 |
ATE267570T1 (en) | 2004-06-15 |
IL145206A0 (en) | 2002-06-30 |
AU774275B2 (en) | 2004-06-24 |
DK1199054T3 (en) | 2004-09-27 |
AU6357901A (en) | 2002-04-18 |
IL145206A (en) | 2006-12-10 |
PT1199054E (en) | 2004-09-30 |
BR0104581A (en) | 2002-09-24 |
EP1314409A2 (en) | 2003-05-28 |
BR0104581B1 (en) | 2012-01-24 |
EP1199054B1 (en) | 2004-05-26 |
ES2217088T3 (en) | 2004-11-01 |
CA2358266A1 (en) | 2002-04-17 |
MXPA01009580A (en) | 2002-04-24 |
JP2002153500A (en) | 2002-05-28 |
EP1314409A3 (en) | 2003-07-16 |
US6398759B1 (en) | 2002-06-04 |
EP1199054A1 (en) | 2002-04-24 |
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8364 | No opposition during term of opposition |